McCartney said the two stars collaborated quickly and with no commitments. “[Kanye and I] had a few afternoons at the Beverly Hills Hotel,” McCartney told Rolling Stone. “The only deal I made with Kanye was that if it doesn’t work, we won’t tell anyone.”

The Beatles legend compared the experience to being with Andy Warhol.”I didn’t know his system,” McCartney continued. “I’d heard things like, ‘He’s got a room full of guys working on riffs, and he walks around going, ‘I like that one.’?’ It reminded me of Andy Warhol, these artists who use students to paint their backgrounds and things. It’s a well-used technique. I thought, ‘I don’t know how I’m going to fit into that, but let’s see. Here goes nothing.'”